WC-5 is a heavy-bodied, water-based, vinyl acrylic mastic, for use over all types of insulation systems, both indoors and outdoors. It can also be applied as a protective coating over masonry surfaces and a variety of other substrates.
NOTE: Special care should be taken when applying WC-5 to foil facing as it will not always bond tightly, depending on the type of foil, test applications are recommended.
WC-5 is suitable for application by brush, trowel, or spray (application method should be specified when ordering). After drying it becomes a tough, flexible, color retentive coating which is resistant to weather, alkalis, oil, grease, moisture, and mechanical damage.
Its normal recommended dry thickness for full-scale outdoor protection is 1/16” (63mils), but it also provides excellent protection at thinner thicknesses. A minimum dry film thickness of 40 mils is recommended. WC-5 should not be applied where it will be subjected to continual standing water.
WC-5 must be protected from freezing during storage. It must be protected during and after application, from precipitation, freezing, oil, grease, and foot traffic until thoroughly cured.
WC-5 is breathing-type mastic which allows water vapor to pass through it. This is a benefit because residual water trapped underneath the coating is allowed to escape in the form of water vapor. WC-5 should not be used over a low temperature system unless a vapor barrier is present.
WC-5 is USDA acceptable for use in meat, poultry, and food processing plants.
Product Information Data
COLOR
White, E2 Gray, Green, Blue, Black (Special colors available upon request)
TYPICAL ELONGATION
750% (60 mils dry, at 70ºF)
COVERAGE (ASTM C 461)
13 sq. ft./gal. at 1/16″ dry ( 63 mils.) (.32 m²/liter at 1.6 mm)
20 sq. ft./gal. at 40 mils dry thickness (.5 m²/liter at 1.0 mm)
FLAME SPREAD INFORMATION
ASTM E 84: 15
ASTM E 162: 14 at 1/16″ dry film (1.59 mm)
DRYING TIME (ASTM D 1640-69)
To touch: 2 hours Through: 24 to 48 hours (depending upon temperature, relative humidity and substrate)
WET FLAMMABILITY INFORMATION
No flash to boiling (212ºF) closed cup (ASTM D 93)
WEIGHT PER U.S. GALLON (ASTM D 1475)
10.2 pounds (1.22 kg/liter)
CLEANUP
Wet state – water
Dry state – safety solvent
SOLIDS
53% ± 2% by volume
RECOMMENDED SHELF LIFE
18 months in unopened container at 40°F (4°C) to 90°F (32°C)
APPLICATION TEMPERATURE RANGE
40°F (4°C) to 120°F (49°C)
VOC (Volatile Organic content, less water) (ASTM D 3960)
0 g/L
MEETS REQUIREMENTS FOR LEED CREDIT 4.2
SERVICE TEMPERATURE RANGE
0ºF to 180ºF constant (-17.8ºC to 82.2ºC)
-20ºF to 200ºF intermittent (-29ºC to 93ºC)
CAUTION
Do not add water to this product as that will change its physical properties and performance. No expressed or implied warranty will be offered on applications where the product has been thinned or altered.